65647216 has 20 divisors (see below), whose sum is σ = 127326424. Its totient is φ = 32788800.

The previous prime is 65647193. The next prime is 65647229. The reversal of 65647216 is 61274656.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20611 + ... + 23581.

Almost surely, 2^65647216 is an apocalyptic number.

It is an amenable number.

65647216 is a deficient number, since it is larger than the sum of its proper divisors (61679208).

65647216 is a wasteful number, since it uses less digits than its factorization.

65647216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360 (or 4354 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 65647216 is about 8102.2969582705. The cubic root of 65647216 is about 403.4026724735.

The spelling of 65647216 in words is "sixty-five million, six hundred forty-seven thousand, two hundred sixteen".